Solve each of the following equations by using the method of completing the square.

$8x^2-14x-15=0$

Solve each of the following equations by using the method of completing the square.

$7x^2+3x-4=0$

Solve the following equation by using the method of completing the square.

$3x^2-2x-1=0$

Solve each of the following equations by using the method of completing the square.

$5x^2-6x-2=0$

Solve each of the following equations by using the method of completing the square.

$\frac{2}{x^2}-\frac{5}{x}+2=0$

Solve each of the following equations by using the method of completing the square.

$4x^2+4bx-(a^2-b^2)=0$

Solve each of the following equations by using the method of completing the square.

$x^2-(\sqrt{2}+1)x+\sqrt{2}=0$

Solve each of the following equations by using the method of completing the square.

$\sqrt{2}{x}^2-3x-2\sqrt{2}=0$

Solve each of the following equations by using the method of completing the square.

$\sqrt{3}{x}^2+10x+7\sqrt{3}=0$